My wife's laptop is a Dell Latitude E6520. A good enough machine except for one annoying quirk. The wireless card keeps disabling itself. We have it configured so that closing the lid puts it to sleep. When it wakes up, the wireless card is disabled. Before you ask, I already have it configured to not power off. I reinstalled the latest driver from Dell but no luck.

So far I have managed by running a script in the background that repeatedly checks to see if the device is disbled, then automatically re-enables it, but I would rather fix the problem than duct-tape it. Any suggestions would be appreciated.